/// <summary>
/// Indicates whether the rover can move forward without crossing the
/// map's boundaries.
/// </summary>
public bool CanMoveForward()
{
int newX = XCoordinate;
int newY = YCoordinate;
// Set the coordinates to what they'll be if the rover moves forward
if (Direction == Direction.South)
{
newY++;
}
else if (Direction == Direction.South)
{
newY--;
}
else if (Direction == Direction.West)
{
newX--;
}
else if (Direction == Direction.East)
{
newY++;
}
// Check if the map contains the new point
return(_map.ContainsPoint(newX, newY));
}
/// <summary>
/// Initializes a new instance of the <see cref="MappedRover"/> class on
/// the given map at the specified coordinates.
/// </summary>
/// <param name="map">Map to place rover on</param>
/// <param name="x">Initial X coordinate</param>
/// <param name="y">Initial Y coordinate</param>
/// <param name="direction">Initial direction to face; defaults to
/// North if not specified.</param>
/// <exception cref="InvalidOperationException"></exception>
public MappedRover(IMapGrid map, int x, int y,
Direction direction = Direction.North)
{
_map = map;
XCoordinate = x;
YCoordinate = y;
Direction = direction;
// Verify that the rover is in a valid position
if (!map.ContainsPoint(XCoordinate, YCoordinate))
{
throw new InvalidOperationException("Rover was placed outside" +
" of map boundaries");
}
}